tourmaline (California state mineral)

GPTKB entity

Statements (19)
Predicate Object
gptkbp:instanceOf gptkb:flag
granite
gptkbp:category silicate mineral
gptkbp:chemicalFormula (Ca,K,Na)(Al,Fe,Li,Mg,Mn)3(Al,Cr,Fe,V)6(BO3)3(Si,Al,B)6O18(OH,F)4
gptkbp:color varied
gptkbp:crystalSystem trigonal
gptkbp:designatedAsStateMineralIn gptkb:California
gptkbp:designationYear 1997
gptkbp:hardnessMohs 7–7.5
https://www.w3.org/2000/01/rdf-schema#label tourmaline (California state mineral)
gptkbp:notablePlace Riverside County
San Diego County
gptkbp:relatedGroup tourmaline group
gptkbp:stateSymbolOf gptkb:California
gptkbp:symbol state mineral
gptkbp:usedFor gptkb:jewelry
granite
gptkbp:bfsParent gptkb:Gem_and_Mineral_Hall
gptkbp:bfsLayer 6